Publishing iOS apps on legacy hardware?

Hey guys. First off, I would post this on the apple dev forums, but I don't have a paid account and can't.

So I'm relatively new to developing on iOS. I've been learning C++ for a year, and have been more recently learning objective-C.

My question is, if my Macbook is not capable of running Xcode 5, will I still be able to push an app to the App Store using the latest version of Xcode 4.x? Or am I totally screwed into having to buy a more recent macbook?

I understand that I will not be able to take advantage of iOS 7. But again, will I still be able to push apps to the App Store that users of iOS 7 will be able to run?

iOS 2 SDK apps were allowed until after iOS 4 was released 2 years later. iOS SDK 3 apps were allowed (for App store submission) until almost a year after iOS 6 was released, 3+ years later. iOS 6 SDK has been required only since May 1st. I doubt that they will deprecate it in less than a year.

If you are in the developer program, you can try your iOS 6 apps on the iOS7 beta to see if they will run. Most run just fine, or with only minor problems.

MacRumors attracts a broad audience
of both consumers and professionals interested in
the latest technologies and products. We also boast an active community focused on
purchasing decisions and technical aspects of the iPhone, iPod, iPad, and Mac platforms.